Free document watermark and privacy masking
Add a usage-only watermark to documents you legally hold, then manually blur, pixelate, or cover sensitive areas before sharing. Image decoding, masking, watermarking, and export stay inside your browser.
How to use this tool
- 1
Open Document watermark & privacy masking
Use it for this task: ID card, license, passport watermark and privacy masking, blur or pixelate sensitive areas, 100% local, no upload.
- 2
Choose an image file
Drag an image into the upload area or click the button, then adjust the image options shown on the page.
- 3
Download or copy the image result
Preview the processed image first, then download it or copy it when the tool supports copying.
Quick facts
| Processing | Image files stay in your browser; no upload or cloud storage. |
|---|---|
| Watermark | Custom text, repeat or single layout, color, opacity, and rotation. |
| Masking | Manual rectangles can blur, pixelate, or cover sensitive areas. |
| Use case | Share copies for onboarding, verification, banking, vendors, or internal review. |
Top use cases
- ID card, license, passport watermark and privacy masking, blur or pixelate sensitive areas, 100% local, no upload.
- Processing: Image files stay in your browser; no upload or cloud storage.
- Watermark: Custom text, repeat or single layout, color, opacity, and rotation.
- Masking: Manual rectangles can blur, pixelate, or cover sensitive areas.
- Use case: Share copies for onboarding, verification, banking, vendors, or internal review.
Document watermark FAQ
Are my documents uploaded?▾
No. Decoding, masking, watermarking, preview, and export happen locally in your browser.
Can it automatically find all sensitive numbers?▾
This first version is manual by design: drag over every area you want to protect, then review before download.
Which documents can I use?▾
Use images of documents you legally own: ID cards, licenses, passports, business registrations, contracts, or screenshots.
Can I remove or edit real identity information?▾
The tool is for watermarking and privacy masking only. Do not use it to forge, alter, or misrepresent documents.
Does blur always hide text completely?▾
For highly sensitive data, pixelate or cover the area with a solid color, and inspect the result at full size.
Which output formats are supported?▾
JPEG, PNG, and WebP export are available when your browser supports them.